Hi all, thanks for allowing me to join the forum.
I have two Color Classics - both Euro units - which I have recapped. One of the CCs has always had an unstable image. By unstable, I mean it generally looks okay but may flicker and change geometry momentarily from time to time. It also looks slightly burnt out, and retrace lines just visible at times.
I have checked for dry joints and excess heat damage on the AB. Just the usual heat marks. Visually, I can't see any issues when compared to my good unit. I did wonder whether some pots were failing or 'scratchy', and while they've seen better days, I'm pretty sure they are not the cause.
My current suspect is the B+ voltage - it's about 68v on the CC with unstable picture, whereas the good unit showed 60v. I guess I can adjust PP1, but it feels like a workaround rather than addressing the root cause. It seems impossible to adjust while the unit is running anyway, so getting it right could be a long process (and potentially damaging!)
Any ideas appreciated.
letiss.
Happy new year!
I have two Color Classics - both Euro units - which I have recapped. One of the CCs has always had an unstable image. By unstable, I mean it generally looks okay but may flicker and change geometry momentarily from time to time. It also looks slightly burnt out, and retrace lines just visible at times.
I have checked for dry joints and excess heat damage on the AB. Just the usual heat marks. Visually, I can't see any issues when compared to my good unit. I did wonder whether some pots were failing or 'scratchy', and while they've seen better days, I'm pretty sure they are not the cause.
My current suspect is the B+ voltage - it's about 68v on the CC with unstable picture, whereas the good unit showed 60v. I guess I can adjust PP1, but it feels like a workaround rather than addressing the root cause. It seems impossible to adjust while the unit is running anyway, so getting it right could be a long process (and potentially damaging!)
Any ideas appreciated.
letiss.
Happy new year!
